在 Node-Red 中，我如何更改一串字母以在每个字母之间有一个句号

Question

我正在 Node Red 中收集一些飞行服务器数据，并将数据作为文本字符串发送给 Home Assistant，以便与 Google TTS 语音一起使用。 我遇到的问题是呼号是一串字母，例如 RYR1234GT，我希望将其作为字符而不是单词来朗读。 我知道每个字符之间的空格或句号可以解决问题 (RYR.1.2.3.4.GT)，但我如何在 Node-Red function 中更改它？

我试过了，但我的 javascript 知识不好。 我在 function 中使用了 substring 并将所有字符分开并使用它转发到 JSON 脚本以组合为字符串。 这一切都适用于添加。 和 a（空格），但它有点难看，当然不会计算呼号的随机长度，但如果有空字符串，这似乎并不重要。 你能告诉我一个更好的方法吗？

这是我的 Node-Red 节点和流程，使用 function 和更改节点

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Answer 1

以下内容适用于任何长度的呼号。

它使用拆分节点将字符串拆分为单独的字符，然后使用连接节点将它们重新组合在一起

[
    {
        "id": "ef9f06be11be1595",
        "type": "inject",
        "z": "da8a6ef0b3c9a5c8",
        "name": "",
        "props": [
            {
                "p": "payload"
            },
            {
                "p": "topic",
                "vt": "str"
            }
        ],
        "repeat": "",
        "crontab": "",
        "once": true,
        "onceDelay": 0.1,
        "topic": "",
        "payload": "BA2156R",
        "payloadType": "str",
        "x": 160,
        "y": 220,
        "wires": [
            [
                "4c86e9ed4d1a16b8"
            ]
        ]
    },
    {
        "id": "4c86e9ed4d1a16b8",
        "type": "split",
        "z": "da8a6ef0b3c9a5c8",
        "name": "",
        "splt": "1",
        "spltType": "len",
        "arraySplt": 1,
        "arraySpltType": "len",
        "stream": false,
        "addname": "",
        "x": 290,
        "y": 220,
        "wires": [
            [
                "902d89b62bc29fbb"
            ]
        ]
    },
    {
        "id": "72ada8de8633d357",
        "type": "debug",
        "z": "da8a6ef0b3c9a5c8",
        "name": "debug 1",
        "active": true,
        "tosidebar": true,
        "console": false,
        "tostatus": false,
        "complete": "false",
        "statusVal": "",
        "statusType": "auto",
        "x": 540,
        "y": 220,
        "wires": []
    },
    {
        "id": "902d89b62bc29fbb",
        "type": "join",
        "z": "da8a6ef0b3c9a5c8",
        "name": "",
        "mode": "custom",
        "build": "string",
        "property": "payload",
        "propertyType": "msg",
        "key": "topic",
        "joiner": ".",
        "joinerType": "str",
        "accumulate": false,
        "timeout": "",
        "count": "",
        "reduceRight": false,
        "reduceExp": "",
        "reduceInit": "",
        "reduceInitType": "",
        "reduceFixup": "",
        "x": 410,
        "y": 220,
        "wires": [
            [
                "72ada8de8633d357"
            ]
        ]
    }
]